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The OpenCV image processing libraries provides hundreds of computer vision algorithms useful in a wide variety of imaging applications. The "core" of the library supports numerous matrix operations which are useful for processing images and for solving linear equations.

A matrix is just a rectangular array of numbers arranged in rows and columns. Here is an example of how to load values into a matrix with 2 rows and 2 columns and add them:

All sky camera software enables the user to sample the sky at periodic intervals, analyze the images for motion, and transfer the images and data to a web service. It may useful to weather watchers, amateur astronomers, and others who have an interest in observing the sky and other astronomical objects as it provides an excellent way to check sky conditions at local or remote locations.